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A. J. KNIGHT. SELF CLOSING NOZZLE.

NG.565,2l1. Patented Aug. 4,1896.

.Wmygdww l@ MMX? UNITED STATES PATENT OrEicE.

ALFRED J. KNIGHT, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE- I-IALE TOJESSE B. THOMAS, OF SAME PLACE.

SELF-CLOSING NOZZLE.

SPECIFICATION forming part of Letters Patent No. 565,211, dated August4, 1896.

Application filed February 11, 1895. Serial NO. 537,843' (NO lllOdel.)

To @ZZ whom t may concern:

Be it known that I, ALFRED J. KNIGHT, of Boston, county of Suffolk,State of Massachusetts, have invented an Improvement in Self-ClosingNozzles, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

rlhis invention has forits object to provide a novel self-closingdelivery-nozzle particularly adapted for the delivery-pipes of'fire-extinguishers, or for lawn-hose or the like,the object of myinvention being to provide a nozzle the valve of which shall beautomatically seated and closed by the pressure of the fluid tending toflow through the nozzle, the valve being removed from its seat to permitthe. discharge of the fluid through the nozzle by suitablemanually-controlled devices.

My invention eomprehends certain other features of construction to behereinafter described and claimed.

In the drawings, Figure l is aside elevation of a nozzle embodying myinvention, and Eig. 2 a vertical longitudinal section of the same withthe valve shown open in full lines and closed in dotted lines.

Referring to the drawings, preferably to Fig. 2 thereof, in theembodiment of the invention there shown, A is the body, provided at oneside with a delivery-nozzle a and at its opposite side with a neck d',suitably formed to receive and hold the end of Aa flexible hose or aconductor. The inlet-passage a2 and the outlet-passage as for the nozzleare shown as placed in communication by means of and through thevalve-opening a4 in the central division or partition a5.

The valve proper, Z9, shown as tapering to fit the preferably-taperingvalve-seat, is mountcd upon the end of a valve-stem b', extendedupwardly through the body A, and outside the latter is provided with asuitable fingerpiece b2, shown as provided at its under side with apreferably rubber or other soft packing-ring b3, adapted to seat uponthe bodyA and assist in preventing leakage.

In the preferred construction the upper portion of the valve-stem b ismade larger in diameter than the lower portion adjacent to the valve toform a shoulder b4, to be described.

The operation of the valve is as follows, viz: lVhen fluid underpressure is admitted to the inlet-passage a2, it at once closes or seatsthe valve upon its seat d4', there being an excess of area at the underside of the valve l) over that at the upper side equivalent to the areaof the valve-stein. To open the valve and permit discharge of the fl uidtherethrough, the operator depresses the fingerpiece b2 from its dottedto its full line position, thereby dropping the valve from its seat andpermitting communication through the inlet and outlet passages, thevalve remaining open only so long as the linger is maintained upon thefinger-piece, it automatically closing at once upon removal of thelinger. To retain the valve in its open position Without requiring it tobe held by the linger, l have herein provided a bail c, pivoted at c, atopposite sides of the body A and adapted to be swung over and to holdthe nger-piece in its depressed position, enabling the nozzle to be leftopen for any desired period of time.

It Will be noticed that there is no packing Where thevalve-stem passesthrough the body of the nozzle. This would ordinarily permit leakage,notwithstanding the rubber packing b3, under the usual pressure at whichfire-extinguishing fluids are discharged; but in the present instance Ihave obviated this by providing what I call a leakage-chamber e,surrounding the valve-stein between the inner Wall of the body and theouter Wall thereof, said leakage-chamber opening into the outlet-passageai.

The passage of the fluid under pressure out through the exit-passage d3acts like an ejector to draw from the leakage-chamber e any fluid whichmay leak thereinto, the suetion being so strong as to prevent anyleakage passing through the chamber to the outside of the body aroundthe valve-stein, such leakage being instantly drawn into theexit-passage. v

I have provided a screw-plug f in line with the valve and at the underside of the nozzle, which, when removed, gives free access to the valve.

To remove the valve, the plug is removed and the valve held againstrotation in suitable manner, while the finger-piece h2 is unscrewed,thereby permitting the valve and its stem to be drawn downwardly throughthe opening left by the removal of the plug f.

The shoulder b4 on the valve-stem is important as assisting in theclosing of the valve, for, assuming the valve to be in its full-lineopen position, the Huid flowing through the nozzle under pressure actsconstantly against this shoulder, and the moment the finger is removedfrom the finger-piece impact of the fluid against the shoulder acts,inaddition to the pressure of the iiuid at the inner side of the valve,to quickly close the valve.

My invention is not limited to the particular shape or constructionherein shown, for it is evident the same may be varied without departingfrom the spirit and scope of the invention, and while I have hereinshown and described my invention in connection with a hose-nozzle, yetit is adapted for use in connection ywith anynozzle or equivalent tipfor discharging {iuid under pressure.

I claiml. Aself-closingdelivery-nozzle containing inlet and outletpassages; aValve-opening between the same; a valve at one side of andcontrolling said valve-opening, the stem rigidly connected with saidvalve and having a sliding movement through an opening in the wall ofsaid nozzle, said sliding stem made less in diameter within and adjacentsaid valve-opening than where it passes into the wall of said nozzle toleave a shoulder or enlargement, immediately adjacent `the saidvalve-opening when the valve is opened, against which the moving iiuidmay impinge and tend to close or seat said valve, and a finger-piece onthe outer end of said valvestem whereby said valve may be opened by afinger of the hand holding the nozzle and aun tomatically closed by thefluid-pressure within the nozzle, substantially as described.

2. A self-closing delivery-nozzle containing inlet and outlet passages,a partition-wall between said inlet and outlet passages, centrallyperforated to provide a valve-seat on the inlet side thereof, avalve-stem operating through said perforation and through one side wallof said nozzle and terminating on its inner end in a Valve carriedthereby, said valve being free when not acted upon by the water-pressureto hang suspended in disengagement with its valve-seat, said valve-stemhaving a sliding longitudinal movement and made of less diameter withinand adjacent said valveopening than where it passes into the wall ofsaid nozzle to leave a shoulder or enlargement immediately adjacent thesaid valve-opening, when the valve is opened, against which the movingliquid may freely impinge and thereby tend to close or seat said valve,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALFRED J. KNIGHT.

Vitnesses:

FREDERICK L. EMERY, JOHN C. EDWARDS.

